Cutter-head for molding-machines



' (No Model.) a V 4 E. K. JENKINS.

CUTTER HEAD EOE; MOLDING MACHINES.

N0.Z59,6'9.Z. Patented June 20, 1882.

W? 4 AAMMM L; jay-'3 Hill" I PPPPPPPPPPP vu NITED STATES PATENT OFFER. I

EDWARD K. JENKINS, OF ALBANY, NEW YORK.

CUTTER-HEAD FOR MOLDING-MACHINES.

SPECIFICATION forming part 'of Letters Patent N 0. 259,692, dated June20,.1882.

Application filed October 27, 18 81. (No model.)

To all whom it may concern:

Be it known that I, EDWARD K. JENKINS, a citizen of the United States,and a resident of the city and county of Albany, and State of New York,have invented certain new and useful Improvements in Cutter-Heads forMolding-Machines, of which the following is a specification.

Myinven tion relates to improvements in cutter-heads of molding-machinesin which T- shaped slots are arranged transverse to the length of thecutter-head and adapted to receive the body and head of anattaching-bolt operated in conjunction with a T- shaped slot arrangedparallel with the axis of the cutterhead, and also adapted to receivethe body and head of another attaching-bolt.

The object of my invention is to provide means by which the knives orbits of cutterheads ofplaning and molding cuttingmachines will besecurely held at two points in their length, in which one point ofattachment and binding of the knife to the head will be on a line radialfrom the axis of the head and the otherpoint of attachment will be at adistance forward of a line drawn parallel with the axis and through thefirst-mentioned point of attachment and toward the outer edge of theside of the head the knife is appliedto, so that the knife will be heldat two points in its length, in which one point will be rearward in thebody of the knife and the other forward in the same and near to the moreprojected cuttin g-edge portion of the knife, instead of in the sameline withthe rearward point of attachment, as heretofore had, therebyholding the knife from springing up from the cutter-head and holding itfrom trembling. I attain this object by means of the devices illustratedin the accompanying drawings, in which similar letters of referenceindicate likeparts throughout the several views.

Figure 1 represents a perspective view of my improved cutter-head. Fig.2 is a crosssectional view of the same. Fig. 3 is a corner plan view ofthe same; and Fig. 4 is a sectional view of the transverse slots, takenat .line No. 1 in Fig. 2.

The cutter-head A is made of metal and with a rectangular or squaredform, and is provided with a central bore, B, for mounting said head.

on a rotating shaft. (Not shown.)

0 Made in the sides 1, 2, 3, and 4 are longitudinal T-shaped slots 0 O(J G, which slots extend from end to end of said head and are parallelwith the axis of the cutter. All the above devices-that is to say, therectangular or squared form cutter, bore B, and longitudinal T-shapedslots-are old. a

My improvement consists in providing said head, having longitudinalslots 0, with transverse T-shaped slots, formed and arrangedsubstantially as follows: In the sides 1 and 3, which are opposite toeach other, are made transverse slots D, which slots are T- shaped inform, as shown in Fig. 4, and correspond in both size and form with thelongitudinal slots 0, and extendin one direction from slots 0, withwhich they communicate, as shown in Fig. 2, to near the edges of saidsides, as shown in side 1, Figs. 1 and 3, and in sides 1 and 3 in Fig.2. -In said sides 1 and 3 the said transverse slots are so arranged asto correspond in size and number each with the other, so that each saidopposing side will balance with the other.

In sides 2 and 4', which are opposite each other and transverse to sides1 and 3, are made transverse T-shaped slots D, which slots are similarto the transverse slots Dmade with sides 1 and 3, above described. Thesaid transverse slots D in sides 2 and 4. are made to correspond in bothsize and number in each said side, so that the said opposing sides willbalance each with the other, the same as sides 1 and?) balance with eachother.

In each of the two opposite sides, as in sides 1 and 3, I make an evenand the same number of slots D, and in each of the transverse sides andin sides 2 and 4 are made an odd and the same number of said slots D, sothat the slots in each of the two opposite sides will be arrangedstaggering or dodging those in the transverse sides, as shown in Fig. 3.

Attaching-bolt's E, provided with screwthreaded nuts, and made withstrong square heads and with form eorrespondin g with the form of thelongitudinal slots 0 and transverse slots D D, and adapted to nicely fitand move inthe same, are employed to attach the cutting knives K or bitstothe h'ead.

Though but one knife is shown in the drawings, yet it will be readilyunderstood by the trade that two knives, each of the same form andweight, are employed and attached to opposite sides of the head, so thatthe head will be balanced.

The knives K are each provided with slots 3 and 8, made in its bodyportion rearward of the cutting-edge. The said slots are each made witha width equal to the diameter of the attaching-boltsE, and receive theoutwardly-projecting portion of the same, as shown, and are made at adistance apart corresponding with the extension of distance between thetransverse slots in the head.

One of the slots--as slot s--is made with a greaterextension oflengththan the otherslot,s.

In knives for cutting moldings the longest slot 8 is madein the portionof the body of the knife which extends rearward from the more projectedportion of the cutting-edge of the same, as illustrated in Fig. 1.

It will be readily understood that the attaching-bolts will each nicelyfit and work in each and all the slots made.

The manner in which the above-described parts operate is as follows:Into one of the transverse slots, as may be selected, made on each sideof two opposite sidesas 1 and 3 or 2 and 4 of the head-is introduced anattaching-bolt, E, and a second attaching-bolt, E, is introduced intothe longitudinal slot made in the same sides. The knives-a pair of likeknives-are then placed in position, one on each of the opposite sidesthe attaching-bolts project from, with the attaching-bolts passingthrough slots 8 s, as shown, when the nuts will be tightened down on theknives.

In cutter-heads of short length a less number of transverse slots may beemployed-say one on each of the sides 1 and 3 and two in the transversesides 2 and 4. In longer heads a greater number of transverse slots maybe employed.

In some cases, when the design of the head is such as to present but twoopposite faces for application of knives, the longitudinal slot 0 andtransverse slots D will be made in the said two opposite sides or facesof such a head.

It will be readily understood that the number of transverse slots in therespective sides may be increased or lessened according to the length ofthe head. It will also be readily understood that by making thetransverse slots on two sides--as 1 and 3dodging the transverse slots inthe transverse sides 2 and 4, the knives may be relatively adjustedlongitudi nally on the head in either direction on two opposite sidesfrom the exact location the said knives would have when secured to theopposite transverse sides.

The new results arising from my improvements are that the knives will beheld more firmly to the cutter-head and at two points on each side, eachremote from the other; and

that the more projected portion of the knifewill be held from springingand the knife be held from trembling, while at the same time the use ofa supplemental or binding piece is obviated.

Having described my invention, what I desire to claim and secure byLetters Patent 1. The combination and arrangen1ent,with a cutter-headhaving longitudinal slots 0 and transversely-arranged slots D or D, madein opposite sides of said head, and attachingbolts E E, adapted to fitin each said slots and hold with said head, of cutting knives or bits K,each provided with slots 8 and 8, whereby said knives or bits will beheld at two points in their lengths on the faces of'said cutter-head,substantially in the manner and for the purpose set forth.

2. The combination, with a cutter-head havinglongitudinal slots 0 madein its four sides and in its two opposite sides transverse slots D,connecting with slots 0 of said opposite sides, and transverse slots D,made in its transverse sides, relatively staggering or dodging thefirst-mentioned transverse slots and cominunicatin g with slots 0 insaid transverse sides, of attaching-boltsE, adapted to work in all ofsaid slots, and also with slots 8 8', made in the knives orcutting-bits, whereby said knives or bits may each be attached to saidhead at two points in their lengths, and be adjusted on two sideslongitudinally on said head in either direction, and be capable of asimilar attachment and adjustment on the transverse sides of said head,with the knives and head balanced substantially as and for the purposesset forth.

EDWARD K. JENKINS.

Witnesses:

CHARLES W. JENKINS, CHARLES SELKIRK.

